package com.bicon.botu.mall.order.websocket;

/**
 * @author 李双喜
 * @date 2018/5/30 17:30
 */

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.bicon.botu.mall.order.dto.TotalPriceDTO;
import com.bicon.botu.mall.order.service.IOrderGoodsService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.List;
import java.util.TimerTask;
import java.util.concurrent.CopyOnWriteArraySet;

@Slf4j
@ServerEndpoint("/websocket/{storeId}")
//@ServerEndpoint(value = "/websocket")
@Component
public class WebSocketServer {

    private IOrderGoodsService iOrderGoodsService;
    /**
     * 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
     */
    private static int onlineCount = 0;
    /**
     * concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
     */
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    /**
     * 与某个客户端的连接会话，需要通过它来给客户端发送数据
     */
    private Session session;

    private static ApplicationContext applicationContext;

    public static void setApplicationContext(ApplicationContext context) {
        applicationContext = context;
    }


    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session) {
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        log.info("有新连接加入！当前在线人数为" + getOnlineCount());
        try {
            sendMessage("连接成功");
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }
    //  //连接打开时执行
    //  @OnOpen
    //  public void onOpen(@PathParam("user") String user, Session session) {
    //      currentUser = user;
    //      System.out.println("Connected ... " + session.getId());
    //  }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session, @PathParam("storeId") String storeId) {
        log.info("来自客户端的消息:" + message);

        for (WebSocketServer item : webSocketSet) {
            try {
                iOrderGoodsService = applicationContext.getBean(IOrderGoodsService.class);
                if (null == iOrderGoodsService) {
                    log.info("iOrderGoodsService为空");
                    return;
                }
                List<TotalPriceDTO> list = iOrderGoodsService.getWarnOrderTotalByStoreId(storeId);
                message = JSONArray.toJSONString(list);
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }


    public void sendMessage(String message) throws IOException {

        this.session.getBasicRemote().sendText(message);
    }

    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
}


